/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 */
package org.jrestful.navigation.core;

import java.util.List;

import org.jrestful.navigation.bean.ConfigBean;
import org.jrestful.navigation.bean.NavgroupBean;
import org.jrestful.navigation.bean.Navigation;
import org.jrestful.navigation.bean.NavigationBean;
import org.jrestful.navigation.bean.NavigatorBean;

/**
 * @author samikc@jrestful.org
 *
 */
public class NavigationProcessor {

	private NavigationBean navigationBean = null;
	
	public NavigationProcessor(NavigationBean navigationBean) {
		super();
		this.navigationBean = navigationBean;
	}

	public String renderHtml() {
		List<Navigation> navigationList = navigationBean.getNavigationList();
		ConfigBean conf = navigationBean.getConfig();
		StringBuilder sb = new StringBuilder();
		sb.append(conf.getStartHtml());
		for (Navigation navi : navigationList) {
			if (navi instanceof NavigatorBean) {
				sb.append(navi.getStartHtml()).append(navi.getEndHtml()).append("\n");
			} else if (navi instanceof NavgroupBean){
				sb.append(navGroupProcessor((NavgroupBean) navi));
			}
		}
		sb.append(conf.getEndHtml());
		return sb.toString();
	}

	private String navGroupProcessor(NavgroupBean navi) {
		// TODO Auto-generated method stub
		StringBuilder sb = new StringBuilder();
		sb.append(navi.getStartHtml());
		for (Navigation n: navi.getNavigationList()) {
			if (n instanceof NavgroupBean) {
				sb.append(navGroupProcessor((NavgroupBean)n));
			} else if (n instanceof NavigatorBean) {
				sb.append(n.getStartHtml()).append(n.getEndHtml()).append("\n");
			}
		}
		sb.append(navi.getEndHtml());
		return sb.toString();
	}

}
